Mechanisms for swaging the ends of pipes

ABSTRACT

One device for swaging one vertical smaller tubular member internally of a larger tubular member comprises a cylindrical swage block for loosely fitting in the large tubular member and resting on the upper edge of the inner smaller tubular member. A plurality (preferably six) pistons and cylinders are suspended from the swage block a precise distance below the upper edge and actuatable radially from the longitudinal axis of the smaller tubular member for deforming the upper edge portion thereof against the larger tubular member for providing more working space internally of the tubular members. A modification comprises a plurality of seven axially spaced apart, parallel layers of swaging pistons and cylinders suspended from the swage block.

United States Patent i1 1 Pogonowski Mar. 5, 1974 MECHANISMS FOR SWAGING THE ENDS P 1 a ry Exami nerThomas H. Eager 0F PIPES Attorney, Agent, of Firm-Thomas H. Whaley, [75] Inventor: Ivo C. Pogonowski, Houston, Tex. Carl Ries [73] Assignee: Texaco, Inc., New York, N.Y. 57] ABSTRACT [22] Fil d; Apr, 26, 1972 One device for swaging one vertical smaller tubular [21] Appl No.: 247,584

U.S. Cl. 29/200B, 29/252 member internally of a larger tubular member comprises a cylindrical swage block for loosely fitting in the large tubular member and resting on the upper [52] edge of the inner smaller-tubular memberzA plurality [51] Int. Cl B23p 19/00, 823p 19/04 (p y /six) pistons and y nd rs ar susp nd [58] 'Field of Search 29/200 B, 523, 517, 203 1); from the swage block aprecise distance below the 61 /46 5 upper edge and actuatable radially from the longitudinal axis of the smaller tubular member for deforming [56] Referen Cit d the upper edge portion thereof against the larger tubu- UNITED STATES PATENTS lar member for providing more working space internally of the tubular members. A modification comg g t g g prises a plurality of seven axially spaced apart, parallel 3I555Is31 1 1971 Pogonow sl l,.............. 29/523 x layers of aging PistolS and Cylinders Suspended from the swage block.

10 Claims, 5 Drawing Figures Aid ZJfi J ZSC fi v zr7c 22 a 2% l 5 x .3 25a /7a 25 v MECHANISMS FOR SWAGING THE ENDS OF PIPES BACKGROUND OF THE INVENTION In the swage joining of two oil well casings by hydraulic expanding devices, a permanent deformation often results in two overlapping casings, depending on the type of joint formed. Where six hydraulic swaging rams are utilized in joining a smaller upperend'of one casing to a larger bottom end of an upper casing, as by dimpling as illustrated in my U.S. Pat. No. 3,555,831, the free upper edge of the smaller inner casing end often distorts into a hexagonal shape with six straight sides spaced from the wall of the larger upper casing. These straight sides accordingly leave less working space in the casings for drill bits, drill stems, etc., for example.

OBJECTS OF THE INVENTION A primary object of this invention is to provide at least two embodiments for carrying out or practicing the disclosed invention.

Another object of this invention is to provide a device for swaging or deforming one tubular member inside of another which is easy to operate, is of simple configuration, is economical to build and assemble, and

is of greater efficiency for providing more working space internally of the tubular members.

A further object of this invention is to provide a swaging mechanism for carrying out the method of joining two horizontal pipes togeher.

Other objects and various advantages of the disclosed devices for swaging one tubular member inside another tubular member will be apparent from the following detailed description, together with accompanying drawings, submitted for purposes of illustration only and not intended to define the scope of the invention, reference being had for that purpose to the subjoined claims.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings diagrammatically illustrate by way of example, not by way oflimitation, two forms or mechanisms for carrying out the method of the invention wherein like reference numerals have been employed to indicate similar parts in the several views in which:

FIG. 1 is a schematic plan view of one embodiment of the new tubular swaging device;

FIG. 2 is a section at 2-2 on FIG. 1;

FIG. 3 is a section at 3-3 on FIG. 2;

FIG. 4 is a schematic section at 4-4 on FIG. 1; and

FIG. 5 is a vertical sectional view of another modification of the embodiment of FIG. 1.

DESCRIPTION OF THE INVENTION DESCRIPTION OF THE DEFORMING DEVICES Two embodiments are disclosed in FIGS. 1 4 and FIG. 5, respectively, for practicing or carrying out the above methods of the invention.

FIG. I, a plan view of a swage 10, illustrates hydraulic oil lines for supplying pressure fluid to swaging actuators disclosed hereinafter.

FIG. 2, a schematic sectional view taken at 22 on FIG. 1 of one of the swaging devices 10 for carrying out at least one of the methods of the invention comprises a cylindrical swage block 11 supporting a deforming means, such as a plurality of pistons and cylinders, pistons (not shown) for being mounted in their respective cylinders 13a, 13d illustrated in this figure.

As illustrated in FIG. 2, the cylindrical swage block 11 is small enough to loosely fitinternally of the enlarged lower end of a tube, as a well casing 14, and large enough to rest on the upper deformed edge 15a of the upper end of a second well casing 15. While the latter'casing is secured to the upper well casing 14 a little below the illustrated section of FIG. 2, the upper deformed edge 15a has straight portions which extend inwardly from the inner wall or are spaced from the inner wall of the casing 14 to accordingly form a shelf on which all items being lowered in the well tend to hand up on.

FIG. 3, a sectional view at 3-3 on FIG. 2, with parts in section illustrates a swage comprising six pistons and cylinders for swedging or deforming into the cylindrical The invention disclosed herein, the scope of which being defined in the appended claims, is not limited in its application to the details of construction and arrangement of parts shown and described, since the invention is capable of other embodiments and of being practiced or carried out in various other ways. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Further, many modifications and variations of the invention as hereinbefore set forth will occur to those skilled in the art. Therefore, all such modifications and variations which are within the spirit casing wall 14, FIG. 2, any section of the cylindrical casing wall 15 spaced from the wall of casing 14, as straight sections particularly. ln- FIG-3, cylinders 13b to 13f are illustrated with their pistons 12b to 12f removed for clarity of disclosure, as well as cylinders 13a and 13d on FIG. 2. These straight sections occur when an inner casing or tube is attached to an outer casing or tube by riveting or swaging as by the forming of dimples through the walls of both tubes, as shown in my above-mentioned U.S. Pat. No. 3,555,831. When an inner tube or casing is thus secured, the result is sometimes inward flaring or warping of the upper free edge of the inner casing. Thus when equally spaced dimples are utilized, the upper edge 15a FIG. 2, of casing 15 forms a rough hexagon in plan view and accordingly six pistons and cylinders are required to reshape the hexagon back into its original cylindrical shape. If eight dimples are utilized as illustrated in inventors above identified patent, to secure an inner casing upper end to an outer casing lower end, then an octagon shaped free upper edge is formed immediately above the dimples on the inner casing upper end.

FIG. 4, a sectional view at 44 on FIG. 1, illustrates more details of the supply and return hydraulic ducts for the pistons and cylinders shown in FIG. 3. Piston and cylinder, 12a, 13a, respectively, are typical. Actuating fluid under high pressure from a high pressure source (not shown) on top of the cylinder block 11, FIGS. I and 4, is supplied through passages 16 and 17 to a central reservoir 18. The high pressure fluid from central reservoir 18 passes to cylinder 13a, FIG. 3, for example, and behind piston 12a through ducts (not shown) and also directly to the inner end 19 of piston rod 20 for actuating piston 12a radially outwardly.

Piston 12a, FIG. 3, has a case-hardened deforming or coldworking tip 21 secured thereto with screws 22 for swaging or deforming inner casing 15, FIG. 2, against casing 14.End 19, FIG. 3, of the piston rod 20 is enlarged to form a return stroke piston. The return stroke of piston 12a is accomplished by de-pressurizing conduits 16 and 17, FIG. 4, the pressurizing conduits 23, 24a, and 250 leading to conduit 26, FIG. 3, and to small cylinder 17 to actuate return stroke piston 19 radially inwardly to the position illustrated. Three vertical ducts 25a, 25b, and 25c are utilized, each duct supplying piston-return-movement-pressure fluid for a pair of pistons. With inward return movement of piston 19, re-

. verse flow occurs in reservoir 18, FIG 4, andconduits l7 and 16.

MODIFICATION I FIG. illustrates schematically, in a vertical section,

another embodiment for practicing the aforementioned method of the invention. This swage a comprises a swage block 11a supporting seven rows of pistons 28 34, each row being similar to the row of the first modification of FIG. 3, with six equally spaced pistons in each row operable in their respective seven rows'of cylinders 28 41. Similarly, reservoir 18a supplies high pressure fluid to the pistons for actuating all pistons for deforming inner casing against outer casing 14. Likewise,

this swage includes return stroke pistons and their accompanying pressure conduits similar to those of the first embodiment for retracting the pistons within the I swage after the swaging or deforming operation.

The swage of each of the above disclosed embodiments have either a self-contained unit mounted thereon including a pump and reservoir of hydraulic fluid with control cables running up the swag e support wire, or they have long pressure hoses extending up the swage support wire to the pumps and reservoirs.

Accordingly, it will be seen that the disclosed swages for for producing more working space internally of two interconnected tubes operate in a manner which meets each of the objects set forth hereinbefore by the use of various combinations of the disclosed multiple piston and cylinder swage.

While two swages have been disclosed, it will be evident that various other modifications are possible in the arrangement and construction of the disclosed swages without departing from the scope of the invention and it is accordingly desired to comprehend within the purview of this invention such modifications as may be considered to fall within the scope of the appended claims.

- I claim:

1. A swaging toolfor deforming an upper edge portion of a first vertical pipe smaller end having a longitudinal axis and joined internally of a second vertical pipe largerend comprising,

a. a swage block for being positioned on the first pipe smaller upper edge portion internally of the second pipe larger end,

b. a plurality of pistons and cylinders suspended from said swage block and extending into thefirst pipe smaller upper edge portion, and

c. hydraulic means for actuating said pistons in said cylinders in a radial direction outwardly from the v first pipe longitudinal axis for deforming the first pipe upper edge portion against the second pipe larger end to provide more operating room internally of the pipes.

2. A swaging device for deforming an edge portion of a first pipe having a longitudinal axis and positioned internally of a larger pipe comprising,

a. cylindrical block means for being positioned in said larger pipe and against said first pipe edge portion,

b. a plurality of pistons and cylinders for being secured to an end of said cylindrical block means and extending into said first pipe, and

c. fluid means for actuating said pistons in said cylinders in a radial direction outwardly from said longitudinal axis for deforming said first pipe edge portion against said larger pipe.

3. A swaging device as recited in claim 12 wherein,

a. the number of said plurality of pistons and cylinders for being secured to said end of said cylinder block means and extending into said first pipe is six for forming the edge portion of the first pipe against the larger pipe.

. 4. A swaging device for deforming an edge portion of a first pipe smaller end internally-of a second pipe larger end comprising,

a. cylinder block means having a longitudinal axis for being positioned in said second pipe larger end against said first pipe edge portion, and

b. deforming means extending from said cylindrical block means internally of said first pipe edge portion in a radial plane normal to said longitudinal axis for deforming said first pipe edge portion against said second pipe larger end.

5. A swaging device as recited in Claim 14 wherein,

said cylindrical block means comprises a cylindrical portion having a diameter greater than that of said first pipe smaller end and less than that of said second pipe larger end for accurate positioning of said deforming means at a precise distance internally of said first pipe edge portion.

6. A swaging device as recited in claim 14 wherein,

a. said deforming means comprises a plurality of pistons and cylinders, and

b. said pistons and cylinders being secured to said cy lindrical block means and operable in said radial plane in a radial direction from said cylindrical block means longitudinal axis for. deforming said first pipe edge portion against said second pipe. 1

7. A swaging device as recitedin claim 16 comprising further,

a. fluid means for actuating said pistons in said cylinders in a radial direction from said longitudinal axis for deformation of said first pipe edge portion against said second pipe.

8. A swaging device as recited in claim 14 comprising further,

a. actuating means for operating said deforming means in a radial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe. 7

9. A swaging device as recited in claim 18 wherein,

a said actuating means comprises fluid means for actuating said deforming means in aradial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe large end.

'10. A swaging device as recited in claim 14 wherein,

a. said deforming means comprises a plurality of layers of pistons and cylinders normal to said longitu dinal axis, and

h. each piston is operable in a radial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe larger end. a

$22 3? UNITED S'IATES PATENT OFFICE CERTIFICATE OF CORRECTION iPatent NO- 3.795.035 Dated March 5 1974 inventor-(s) Ivo C. Pogonowski It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

IN THE CLAIMS:

3, line 1, "12" should be --g--.

5, line 1, "14" should be Claim 6 line 1, "14" should be ,line "'16" should be --6--.

, line "14" should be Claim 9, line "18" should be Claim 10, line 1, "14" should be Signed and sealed this 8th day of October 1974,

(SEAL) Attest:

MCCOY M. GIBSON JR. c. MARSHALL DANN Attesting Officer Commissioner of Patents 

1. A swaging tool for deforming an upper edge portion of a first vertical pipe smaller end having a longitudinal axis and joined internally of a second vertical pipe larger end comprising, a. a swage block for being positioned on the first pipe smaller upper edge portion internally of the second pipe larger end, b. a plurality of pistons and cylinders suspended from said swage block and extending into the first pipe smaller upper edge portion, and c. hydraulic means for actuating said pistons in said cylinders in a radial direction outwardly from the first pipe longitudinal axis for deforming the first pipe upper edge portion against the second pipe larger end to provide more operating room internally of the pipes.
 2. A swaging device for deforming an edge portion of a first pipe having a longitudinal axis and positioned internally of a larger pipe comprising, a. cylindrical block means for being positioned in said larger pipe and against said first pipe edge portion, b. a plurality of pistons and cylinders for being secured to an end of said cylindrical block means and extending into said first pipe, and c. fluid means for actuating said pistons in said cylinders in a radial direction outwardly from said longitudinal axis for deforming said first pipe edge portion against said larger pipe.
 3. A swaging device as recited in claim 12 wherein, a. the number of said plurality of pistons and cylinders for being secured to said end of said cylinder block means and extending into said first pipe is six for forming the edge portion of the first pipe against the larger pipe.
 4. A swaging device for deforming an edge portion of a first pipe smaller end internally of a second pipe larger end comprising, a. cylinder block means having a longitudinal axis for being positioned in said second pipe larger end against said first pipe edge portion, and b. deforming means extending from said cylindrical block means internally of said first pipe edge portion in a radial plane normal to said longitudinal axis for deforming said first pipe edge portion against said second pipe larger end.
 5. A swaging device as recited in Claim 14 wherein, said cylindrical block means comprises a cylindrical portion having a diameter greater than that of said first pipe smaller end and less than that of said second pipe larger end for accurate positioning of said deforming means at a precise distance internally of said first pipe edge portion.
 6. A swaging device as recited in claim 14 wherein, a. said deforming means comprises a plurality of pistons and cylinders, and b. said pistons and cylinders being secured to said cylindrical block means and operable in said radial plane in a radial direction from said cylindrical block means longitudinal axis for deforming said first pipe edge portion against said second pipe.
 7. A swaging device as recited in claim 16 comprising further, a. fluid means for actuating said pistons in said cylinders in a radial direction from said longitudinal axis for deformation of said first pipe edge portion against said second pipe.
 8. A swaging device as recited in claim 14 comprising further, a. actuating means for operating said deforming means in a radial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe.
 9. A swaging device as recited in claim 18 wherein, a said actuating means comprises fluid means for actuating said deforming means in a radial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe large end.
 10. A swaging device as recited in claim 14 wherein, a. said deforming means comprises a plurality of layers of pistons and cylinders normal to said longitudinal axis, and b. each piston is operable in a radial direction from said longitudinal axis for deforming said first pipe edge portion against said second pipe larger end. 